▎ 摘　　要

NOVELTY - Domestic garbage compost from lawn of Tianjin garbage processing plant is selected, classified and crushed. The soil of Tianjin normal university is tested using plastic pots. Each pot of campus soil, domestic waste compost is added to each pot, and soil is planted with soil matrix. Carbon nanomaterials, graphene, graphene oxide and carbon nanotubes are added to soil, mixed, provided to lawn and Festuca arundinacea seeds are planted in soil and test is conducted at indoors. During incubation, illumination condition is carried out. USE - Improvement of number of nematodes in lawn compost substrate (claimed). ADVANTAGE - The method provides lawn compost substrate with improved number of nematodes. DETAILED DESCRIPTION - Domestic garbage compost from lawn of Tianjin garbage processing plant is selected, classified and crushed. The soil of Tianjin normal university is tested. Graphene microchip with size of 0.5-20 mu m and specific surface area of 40-60 m2/g, graphene oxide sheet with average thickness of 3.4-7 nm, diameter of 10-50 mu m and specific surface area of 100-300 m2/g and carbon nanotubes with diameter of 20-40 nm, length of 10-30 mu m and specific surface area of more than 110 m2/g are selected. The soil is tested using plastic pots with height of 15 cm and diameter of 20 cm. Each pot of 1500 g campus soil, 50 g domestic waste compost is added to each pot and soil is planted with soil matrix. Carbon nanomaterials, graphene, graphene oxide and carbon nanotubes are added to 1 weight/weight% soil mass, and content of carbon nanomaterials is controlled. Soil, domestic waste compost and carbon nanomaterials are mixed. Mixture in each pot is provided to lawn and 5 g F.arundinacea seeds are planted in soil and test is conducted at indoors. Plastic pots are discharged randomly and moved every 5 days. During incubation, the temperature is maintained at 15-26 degrees C, relative humidity is maintained at 35-55%, and illumination condition is carried out with incident light under natural conditions, and water replenishment is weighed with respect to demand by electronic balance. The whole experiment last for 130 days, and batch (b1) at 65 days is cut and measured. An INDEPENDENT CLAIM is included for usage of carbon nanomaterials for increasing number of nematodes in lawn compost substrate for altering underground ecosystem cycle.